Shampoo brush



FIG. 1 is a front, top and left side perspective view of a shampoo brush, showing my design.

FIG. 2 is a rear, bottom and right side perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation thereof.

FIG. 6 is a right side elevation thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

CLAIM The ornamental design for a shampoo brush, as shown and described. 